# XTR117AIDRBR

**Texas Instruments** · Global Sourcing Parts · WSON-8-EP(3x3)

XTR117AIDRBR from Texas Instruments, in a WSON-8-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | No connection. |
| 2 | IIN | input | Current input pin, sets output current with 100:1 gain (IO = 100 × IIN) referenced to IRET potential. |
| 3 | IRET | power_in | Local ground return reference for voltage regulator (VREG) and current input (IIN) circuits. |
| 4 | IO | output | Regulated 4-20mA current loop output, limited to maximum 32mA by internal current limit circuit. |
| 5 | E | input | External transistor emitter connection, connects to emitter of external NPN pass transistor (recommended TIP29C or equivalent). |
| 6 | B | output | External transistor base connection, output drives base of external NPN pass transistor for output current regulation. |
| 7 | V+ | power_in | Loop power supply input, recommended operating range 7.5V to 40V, absolute maximum 40V. |
| 8 | VREG | output | 5V regulated voltage output from on-chip regulator, capable of supplying external circuits with maximum short-circuit current of 12mA. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-8-EP(3x3) |
| Category | Global Sourcing Parts |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `XTR117AIDRBR`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: WSON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `xtr117aidrbr-etched.step` / `xtr117aidrbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xtr117aidrbr.step` / `xtr117aidrbr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/xtr117) (27 pp, sha256 `326e79eadab06ea4`, retrieved 2026-10-05, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/xtr117aidrbr-datasheet.pdf)